ARVADA — Vice President Joe Biden swiped at his Republican opponents Mitt Romney and Paul Ryan at two rallies in Colorado Saturday, calling them disingenuous and with fundamentally different views on how to fix America.

It was Biden's second trip to Colorado this campaign season. Besides this stop at Arvada West High School in Jefferson County, he also will speak to supporters in Pueblo today.

GOP presidential hopeful Mitt Romney has rallies scheduled today in Colorado Springs and in Centennial at the Comfort Dental Amphitheater.

When taking the stage, Biden reminded the crowd that tonight was end of Daylight Savings time.

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"It's Mitt Romney's favorite time of the year because he gets to turn the clock back," Biden said. "He wants to turn the clock back so desperately, this time tonight he can really do it. I get in trouble, but I tell you what, I am so ready to win this election."

Before crowds of 900 and 1,200 at high schools in Jefferson County and Pueblo, respectively, Biden said he believed in a stronger American future than his opponents and said he was optimistic about the future.

"I'm referred to as the White House optimist, as if I fell off the turnip truck yesterday," Biden told people gathered in Arvada. "Hey man I've been there longer than all of them. I give you my word, I'm more optimistic about America's chances now than I was when I was elected when I was 29 years old."

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The Obama campaign released numbers Saturday morning noting the president leads by 10 points among those who have already voted, according to Keating Research, Inc., a Colorado pollster.

The campaign also said turnout is up 18 percent among African-American voters and 23 percent among Latinos from four years ago.

Early voting numbers from the Colorado Secretary of State's office through Friday show registered Republicans leading Democrats in early voting by about 38,000 votes, though 449,720 unaffiliated voters had also already voted through Friday.

Romney and Obama are statistically tied in Colorado, according to a Denver Post poll out this weekend that gives Obama a slight two-point lead which is still within the 3.5 percent margin of error.

Much of Biden's stump speeches Saturday were similar to what he said a few weeks ago in Greeley, calling Romney "stuck" in the 20th century on women's issues and saying his inconsistency makes him untrustworthy.

"As hard as they try, they can't bring themselves to climb into the 21st century," he said. "He is straight out of the 1950s and 1960s."

Between the rallies in Arvada and Pueblo, Biden made an unannounced stop to Beau Jo's Pizza on 54th Avenue and Vance Street in Arvada. He clapped the hands of people eating the Colorado-famous pizza with honey crusts and held babies. There was a young girls' soccer team there, too, and Biden told the parents that, "I spent my whole life going to soccer games."

With nine rallies in four days in Colorado, even the diehards are a bit weary of all the politics.

But the surprise trip to the pizzeria — and getting to meet Biden in person — was something Beau Jo's manager Scott Valente said he couldn't even put into words.

"It's one of those things you don't understand the meaning of until you see all those cars pulling up with the lights," he said. "I can't put it into words what that was like."